Inventor · disambiguated record
Shigetoshi Okamatsu
Also filed as: OKAMATSU SHIGETOSHI
13 granted patents·272 citations·filing 1979–2008
93Inventor score
Files withHITACHI LTD13
Top patents by PatentIndex Score
13 records- 0194US4335337AControl system for electric motor vehicleHITACHI LTD·Filed 1979·Granted Jun 15, 1982·68 cites·3 claims
- 0284US4490666AControl of induction motor using PWM inverterHITACHI LTD·Filed 1982·Granted Dec 25, 1984·34 cites·20 claims
- 0381US4825131AControl system for induction motor driven electric carHITACHI LTD·Filed 1987·Granted Apr 25, 1989·41 cites·18 claims
- 0475US4327313AControl apparatus for electric carHITACHI LTD·Filed 1980·Granted Apr 27, 1982·27 cites·15 claims
- 0571US4675799AControl system for power converterHITACHI LTD·Filed 1983·Granted Jun 23, 1987·21 cites·8 claims
- 0670US7869232B2Electric power converter suppressing output voltage variation due to input voltage fluctuationHITACHI LTD·Filed 2007·Granted Jan 11, 2011·7 cites·16 claims
- 0770US4315203AControl system for induction motor-driven carHITACHI LTD·Filed 1980·Granted Feb 9, 1982·24 cites·11 claims
- 0865US6611125B2Method for calculating inertia moment and driver for electric motorHITACHI LTD·Filed 2001·Granted Aug 26, 2003·14 cites·14 claims
- 0962US7710053B2Motor driving system and motor driving methodHITACHI LTD·Filed 2008·Granted May 4, 2010·6 cites·4 claims
- 1060US4338558AInduction motor control system and methodHITACHI LTD·Filed 1980·Granted Jul 6, 1982·14 cites·16 claims
- 1159US7906933B2Apparatus and method for driving an induction motorHITACHI LTD·Filed 2007·Granted Mar 15, 2011·5 cites·4 claims
- 1247US4672525AGuard system for inverter apparatusHITACHI LTD·Filed 1986·Granted Jun 9, 1987·11 cites·18 claims
- 1332US6646896B2Controller of AC machineHITACHI LTD·Filed 2002·Granted Nov 11, 2003·0 cites·15 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →